Ren, Yizhen
Li, Shichen
Zhou, Shijie
Wang, Yuping
Li, Lingyan
Zhang, Jinqiang
Yang, Yanjie
He, Jincai
Zhu, Xiongzhao
Funding for this research was provided by:
National Key Technologies R&D program in the 11th 5-year plan from the Ministry of Science and Technology of the People’s Republic of China (2009BAI77B06)
National Natural Science Foundation of the People’s Republic of China (81671341)
Article History
Received: 13 August 2018
Accepted: 11 December 2018
First Online: 17 December 2018
Compliance with ethical standards
: This study was approved by the Ethics Committee of The Second Xiangya Hospital, Central South University in Hunan, China (reference number: 2010S177). From November 2013 to February 2016, eligible women at a hospital were informed of purposes of this research. Women who voluntarily participated in this research signed written informed consent.
: The authors declare that they have no conflicts of interest.